Machine for molding plastic material.



PATE'NTED MAY 12, 1908.

I. L, CAMPBELL.

MACHINE FOR MOLDING PLASTIC MATERIAL.

APPLICATION FILED AUG. 5.1907.

- a certain new and useful Im roved Machine JAMES LESLIE CAMPBELL, OF WEST ADELAIDE, SOUTH AUSTRALIA, AUSTRALIA MACHINE FOR MOLDING PLASTIC MATERIALv Specification of Letters Patent.

Application filed August 5, 1907.

Patented May 12, 1908. SeriaINo. 387,159. 7

To all-whom it may concern:

Be it known that I, JAMEs LEsLIE CdMP- BELL,- a subject of the King of Great Britain and Ireland, residing at Roebuck street, West Adelaide, State of South Australia, Jomrnonwealth of Australia, have invented for Molding Plastic Materia, of which the following is a specification.

My invention is an lmproved machine for molding plastic materialir'ito lengths of any 4 desired section, and it has been designed especially for manufacturmg lengths of core as used in foundry Work and lengths of clay adapted to be cut intobrick's...

My invention comprises a tubular body or fformer with a feed hopper over an openmg 111 same; a reciprooatable plunger within such former, and means for operating the plunger; all mounted upon a suitable bed;

In order that m invention. may be clearly understood .I wil describe the same with "reference to the accompanying drawingsin which- I Figure l is a side. view of my improved machine. Fig. 2 is a plan view of same. Fig. 3 is a'vertical central longitudinal section. Fig. 4 is avertical central cross section. .Fig. 5 is a plan view of the bed alone.

The former consists of a tubular body A having an internal cross section of the shape of the required length of material. A separate former is re uired for each variat on in shape and size 0 cross section. In the upper portion of'this tubularbody is an openfin over which. is arranged a hop or B for ho lding the plastic material an through which. -it may be pressed. down into the tube either by hand or by mechanical means as preferred. The plunger (J is of size and sha e to approximately fit and slide easily Wit the ,former and when used in core making has upon its forward or operative end a spike G of suitable size to make a vent hole 1 through the length of core.

The means for o erating the lunger consists of some suita le device w ereby a ciprocating movement may be given to the phmger. v D and toothed sector E with handle, or the plunger may be connected to a disk or crank operated by means of a pulley. The rear end of the plunger is attached to the front "end of the rack by a bolt F passing through an eye in the plunger and through a vertical slot in the rack the vertical slot permitting In the drawing I show a rack bar I of the attachment of different sized plungers.

The toothed sector is mounted upon a pin H carried by lugs rising from the bed K.

As shown in the (.lrawings the tubular body .A is mounted uponthe bed K means ol an intermediate block M. This block has a flat bed with lloles'fit'ting over two studs K K. projecting upwardsfrom the bed K.v On its top side it has two lugs IW'M with 4 portions of the tube which'are bentoutwards to form the feed opening, as shown in Fig. 4,

{it neatly between the lugs M M and assist in holding the tube firmly in position in the block. The hopper, and with it the intermediate block, is clamped down to the bed by a clip B on one side and-a pivoted eccentric catch B on the other fitting beneath projecting flanges K K on the bed.

The length bf material may be made of round, square or-other cross section it being necessary to have a separate. tube' or .former and separate plunger for each size and shape of cross section.

In operation the lastic material is ressed down through the opper' into the tu e and as tho lunger is T801 rocated it drives the material through the elivery end of the tube' 'on to a receiving tray (not shown in the drawing). By the repeated movement of the plunger any required length of material is. produced having the external shae and size of the hole through which it is orced. This length. may then be cut into' shorter lengths as required by hand or by mechanical means.

- Having now fully described and ascertained my said invention and-the manner in which it is to be performed I declare that what I claim is--v Y .l. A machine for molding plastic material comprising a tubular body or former having a longitudinal iced opening, the sides of the former adjacent the opening being turned outwardly to form flanges, a bed, a block resting on the bed and provided with end having openings through which the ends f of the former project, the ends of the outturned edges oi the feed opening engaging the inner iacps of the lugs, 21. plunger providcd with a core pin movable through the former, a rack bar provided with a transverse slot, a pin traversing the slot and the adjacent end of the former, and a toothed sector pivoted to the'bed and meshing with the teeth of the rack bar, said sector being provided with a handle for convenience in manipulating the same.

2. A machine for molding plastic material comprising a tubular'hody or former having a longitudinal feed opening, the sides of the former adjacent the opening being turned outwardly to form l'langes, a bed, a block resting on the bed and provided with end lugs having openings through which the ends of the former project, the ends of the outturned edges of the feed-opening engaging the inner faces of the lugs, a plunger movable through the former, a rack bar provided with a transverse slot, a pin traversing the slot and the adjacent end of the former, and a toothed sector pivoted to'the bed and mesh ing with the teeth of the rack bar, said sector being provided with a handle for convenience in manipulating the same. i

3. A machine for molding plastic. material,

com prising a tubular body or former, having v a longitudinal feed opening, the sides of the former adjacent the openin bein turned outwardly to form flanges, abed, allock on the bed, and provided with end-lugs having openings through which the ends of the forn'iernproject, the ends of the outturned edges of the feed opening engagin the inner face of the 1ugs,"-. plunger movable through the lEOIlllGlff'iilld means for operating the plunger.

JAMES ILJJSLIE CAMPBELL.

Witnesses Airmen (301m COLLISON, LESLIE HERBERT BRoADBEN'r. 

